Pump-valve



(No Model.)

A. J. HOPKINS. PUMP VALVE.

No. 474,579. Patented May 10', 1892.

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STATES PATENT OFFICE.

ANDREW J. HOPKINS, OF BEAVER FALLS, PENNSYLVANIA.

` PU NIP-VALVE..

SPECIFICATION forming part of Letters Patent No. 474,579, dated May 10, 1892.

i Application tiled .Tune 5, 1890. Serial No. 354,328. (No model.)

To @ZZ whom t may concern,.-

Beit known that I, ANDREW J. HOPKINS, of Beaver Falls, in the county of B eaver and State of Pennsylvania, have invented certain new and useful Improvements in Pump- Valves; and I do hereby declare that the fol l lowing is a full, clear, and exact description oi' the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

This invention relates to certain improvements in pumps.

The object of the invention is to provide improved valves for use in such pumps as described in my pending application, Serial No. 351,096.

This invention consists in certain novel features of construction and in combinations of parts more fully described hereinafter, and particularly pointed out in the claims.

Referring to the accompanying drawings, Figure l is a vertical longitudinal section of a double-acting pump. Figs. 2, `3, and 4 are perspective views and an elevation of the ditferent and improved constructions ot valve employed in the pump.

In the drawings the reference-letter a, indicates the main chamber of a double-acting pump in which the piston b reciprocates and is carried by a suitable piston-rod, as shown.

c is the suction-pipe into the bottom of themain cylinder, normally closed by the checkvalve d to prevent baclztlow from said main cylinder.

e is a side conduit extending from the upper end of the suctioupipe longitudinally up the exterior of the main cylinder into one end of a U-passagef, formed in the upper capf of the main cylinder, the opposite end of said passage discharging into the upper end of the cylinder. g is a similar side conduit on the other side of the main cylinder, at its lower end opening into the lower end of the main cylinder. At its upper end this side conduit g opens into the lower end or bottom of a valve-chamber h, formed on the side of the main chamber. The open top ot this chamber is closed bythe cap f,and the discharge-pipe of the pump opens throughsaid cap into the top of the valve-chamber. The bottom of the valvechamber is inclined downwardly andinwardly toward the wall of said main cylinder and is provided with the port j, and theverticalwall separating said valve-chamber and the main cylinder is provided with port 7c from the main cylinder into said chamber. A valve-frame rests in said chamber and is formed to tit snuglyin the acute angle formed by said bottom and vertical side of said chamber, and said frame consists of the two leaves or wings Z l', cast together and integral and forming an acute angle, as shown, said leaves at the outer edges of their inner ends being connected by bracing cross-webs m, integral with the leaves. The leaf Z rests snugly against said vertical wall of the valve-chamberl and is provided with a port k', registering with port 7c, and the other wing l is provided with a portj, registering with port j, and rests on and snugly lits the inclined bottom of said chamber. This frame carries the two valves n n for the ports 71: and j', respectively. These valves are formed by a single piece of leather or other suitable material bent at the center and pressed in between the two leaves of the valve-frame and retained in this position by a rod o, extending above the told in the leather and through perforations in said cross bracing-webs, and said webs on their inner sides are lprovided with vertical grooves p to allow the rod to be easily removed from said. webs when desired. Circular metal plates q are secured on the two valves opposite said ports in the valve-frame to render said valves rigid and prevent them from drawing through the ports, and one of said valves is provided with an inwardly-extending stop-pin r to engage the opposite valve, thereby limiting the swing ot said valves away from their respective'seats and ports, so as to allow just sufficient room for the water to pass through the port and around the valve, whereby the two valves will quickly assume their normal positions, closing the ports,and will work quicker and easier, and the pump will work smoothly and regularly and entirely free from the irregular and jerking motion more or less common with all other forms of valves.

The port from the U-passage f in the upper cap into the upper end of the main cylinder is provided with a hinged valve to close IDO said port when the piston moves up, and this valve consists of the metal plate u, bolted or secured to the under side of the cap f by bolts or screws passing therethrough and provided With the depending perforated ears a integral therewith, and the valve proper, consisting of the plate b", having perforated ears c', corresponding and registering with ears a', and the plate b', is hinged to said stationary plate by the bolts, screws, or pins d', passed through the perforations in each pair of ears a o', and this plate b is faced With leather on its upper side to form a tight joint With and' tightly close the said port when the valve is formed up, and when the piston moves down the valve drops and is limited in its movement by the stop-pin e engaging stationary plate, a. This pin is. preferably formed integral with the swinging valve-plate. YVhen the piston is raised, the Water passes out through ports la k into the,- valve-chamber h, pressing back val ve n and pressing down valve When the` piston, is forced down thev Water passes uppassage gl into, the valve-chamber ing valve n.

It is evident-that various changes might bey parts described Without departing from the spirit and scope of my invention. Hence I do not Wish to limit myself to the exact construction herein set forth.

What I claim isl. The combination,with the integral valveframe consisting of the two diverging leaves having ports and leaves forming an acute angleV and the perforated cross-Webs at the outer ends of their inner edges, of the valves for said ports, formed of a single piece of flexible 'material bent and inserted between said ileaves, having their free ends strengthened,

and the rod passing through said Webs and retaining the valves, as set forth.

2. In a pump,the combination of the valvechamber having thei-nclined bottom Wall proi vided with a port and the vertical side Wall having a port, the valve-frame snuglytting in said chamber, and the valves carried by i said frame to alternately close and open said ports, substantially as described. 'n' tightly on its seat, closingl ports j j', and

In testimony that I claim the foregoing as my own I .affix my signature in presence of l l.two witnesses. through ports j y', openingA valve n and closl ANDREW J. HOPKINS. Witnesses:

G. L. EBERHART, S. WALLACE MILLER. 

